Hoisting-machine.



E. D. HOOKER.

HOISTING MACHINE.

APPucATxoN FILED rs.14.1918.

Patented Oct. 8, 1918..

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EDWARD D. Hoo-XDR, or NEW Yortx, iv. vY., l,assrfiiaolrt To GILDrsa GDOGHDGAN, 0F

NEW YoRK, N. Y., 'A FVIR'M.

HoIs'rING-MACHNE.

To all wko/m' tmag/ concern.'

Be it known that I, EDWARD D. I-Ioo'inir, 'a citizen of the United States,-residing in the city of New York, borough of Manhattan, in the county and State of New York, have invented a certain new and useful Improvement in IrIoisting-Machines, of which the following is a specification.

The invention relates to that class of hoisting machinery in which the hoisting cable is wound spirally in a corresponding groove on the winding-drum, and the object of the invention is to provide simple, inexpensive means for retaining the cable properly in the groove and preventing the coils from riding one upon another when the cable is relaxed and the helix formed thereby tends to expand. The improvement serves usefully 4with cables of any materials but is of special advantage when wire cables are employed having the stiHness and elasticity inherent in cables of that description.

The invention consists in certain novel features of construction and arrangement by which the above objects are attained, to be hereinafter described and claimed.

The accompanying drawings form a part of this specification and show the invention as it has been carried out in practice.

Figure l is a front elevation of a hoisting drum and the immediately adjacent portionsl of the hoisting machine, partly in vertical axial section.

Fig. 2 is a transverse section taken on the line 2 2 in Fig. 1 and partly in elevation.

Fig. 3 is a vertical section on a larger scale, taken longitudinally of the drum and across several runs of its groove.

Similar letters of reference indicate the same parts in all the figures.

A A are portions of the fixed framework of a hoisting machine which may be of any approved type and driven in any manner. B is the winding-shaft and B1 a gear-wheel thereon which may be understood to be cast in one with the winding-drum B2; the latter has a deep spiral peripheral groove I) in which the cable M is received as usual.

C is a cylindrical shell or casing inclosing the drum and held concentrically thereto, but separated therefrom, by angle -irons or brackets C1 secured to the exterior of the casing and to an adjacent portion of the frame, to provide an annular space between Patentedct, '1918.

Application fued February 14., 5191s. `yser-iaiire. 217,042.

the drumand interior ofthe easing. The

:latter-'is slotted longitudinally as at c, along the line traversed by the cable M as it is taken up or paid out tangentially to the drum, and a similar slot c1 is preferably provided along the underface of the drum to permit the easy escape by gravity of any particles of foreign material which may enter with the cable and tend to fill the groove or otherwise interfere with the proper reception of the cable.

As shown in the drawings the slots c c1 extend the full length of the casing and divide it into two semi-cylindrical portions each joined to the frame A by the brackets or angle-irons C1. This arrangement is preferable in that it permits the casing to be easlily applied and removed but is not essentia The cable -slot c is of such width and so located as to permit the cable to extend therethrough tangentially of the drum it its traverse thereon without contacting with the lips of the slot which are preferably rounded to avoid sharp edges.

The annular space bet-Ween the casing and drum, or the peripheral line of the coils on the latter, should be only suiiicient to provide the required clearance when the cable is taut in the groove, so that when the coils expand by reason of slack in the cable, they will be arrested in their outward movement by contact against the interior of the casing and their escape from the groove prevented, as illustrated in Fig. 3.

It is preferable that the groove be of sufficient depth to receive the cable entirely within the peripheral line of the drum, but it'is essential only that the depth of the groove and the clearance space be so proportioned as to confine the cable to the groove when its coils are expanded.

I claim 1. In a hoisting machine, the combination of a drum having a spiral groove in its periphery adapted to receive a cable therein, and a casing inclosing said drum and separated therefrom annularly and supported at diametrically opposite points independently of the drum and adapted to prevent the expansion of the coils of said cable and hold the latter in place in such groove when said cable is slack, said casing having a slot for the admission anddelivery of said cable taugentially of Said drum and means for the escape of loose material from the interior of the casing. Y

2. In a hoisting machine, the combination .i5 of a drum having a spiral groovein its periphery adapted to receive a cable therein, and a casing inclosing said drum and separated therefrom annularly and adapted to prevent the expansion of the coils of said "lo cable and hold the latter in place in .such

groove when said cable is slack, said casing having` a slot for the admission and delivery of said cable tangentially of said drum, and a slot below said drum for the escape by gravity of loose material from the interior Copies of this patent may be obtained forrrve cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

